|I have several yellow yarrow plants that are about six years old that need to be divided. How is this done? Do you dig the whole plant up and divide it in half? You have been very helpful to me several times before, thanks for being there when we novices need help.
|You've got the basic idea. Water the plant well the day before you do this. Trim back any tall stems to about 6 inches. Dig up the entire clump and divide it into sections by cutting straight down. I use a sharp flat spade for this. Each section should have some roots and some top growth. A piece about 6 inches across will make a nice plant next year but you can make even smaller ones if you want more plants. If the center seems woody, discard it and just use the more vigorous outer edge of the plant for making the divisions. Replant the divisions at the same depth they grew before, water in well and mulch around them. Keep an eye on the water until they are reestablished.